Hydronic zone valve usually works in a hot water heating system. The valves are used in conjunction with thermostat, a transformer, a circulator pump and the boiler. When the temperature of thermostat is raised higher than the temperature of room then zone valve gets turned on and hot water is circulated in the heating zone via heating elements.

To test a zone valve to see if it is working, first turn up the thermostat to its maximum level and feel and hear for hot water circulating around the heating elements. If you do not feel or hear any hot water circulating around the heating zone, pull down on the lever on the zone valve to force the valve open.

If the lever goes down easily, without any resistance, chances are the problem is not with the zone valve. If the lever is difficult to pull down then the zone valve is likely to have a problem.

While pulling down the zone valve, if some resistance was felt then the hot water should begin to circulate around the heating elements related with that particular zone. However, if hot water does not start circulating then there could be a problem in the zone valve, circulator pump or boiler.

If you have a common circulator pump that is driving all of the heating zones and the other zones are working properly then you can discard that circulator pump and there may be a problem with the boiler.

If you are good in using a multimeter then you can also test a zone valve to see if it is being properly powered by the transformer that supplies a 24V voltage to it. Set the multimeter to read DC voltage up to 50 volts.

Then measure the voltage across the wires coming from the transformer that connect to the zone valve. If you do not measure a 24V voltage then chances are the transformer is bad. If you do measure a 24V voltage and there is a common circulator pump feeding all the zones and all the other zones are working then chances are the thermostat or zone valve is the problem.

In case after evaluating the hot water heating system and testing the zone valve the problem still persists then call a plumber to solve the problem. Keep in mind not to remove the zone valve head.

Scott Rodgers is a noted writer who has been providing great guidance on plumbing works all across the nation. His splendid knowledge has, in fact, sparked significant rise in revenue for talented plumbers across the nation, from Wapakoneta Plumbers to Washington Court House Plumbers .

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